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SEOptimer vs Website Grader: catalog facts
SEOptimer	Website Grader
Freemium Free single audits; white-label reports and the full toolset need a paid plan with free…	Free Free to use in the browser.
Web	Web
Instant audit from a single URL Prioritised, plain-language recommendations	Free and runs in the browser with just a URL Covers performance, mobile, SEO and security in one report
Report branding and deeper features are paid Scores are a summary rather than a full crawl	Less detailed than dedicated performance or SEO audit tools Part of HubSpot's marketing ecosystem
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.